Letteratura scientifica selezionata sul tema "Composés ternaires – Propriétés optiques"
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Articoli di riviste sul tema "Composés ternaires – Propriétés optiques":
Degert, J., N. Lascoux, S. Montant, S. Létard, G. Chastanet, J. F. Létard e E. Freysz. "Étude des propriétés optiques de composés à transition d'état de spin". Journal de Physique IV (Proceedings) 135, n. 1 (ottobre 2006): 303–4. http://dx.doi.org/10.1051/jp4:2006135099.
Bhira, L., M. Amlouk, S. Belgacem, R. Bennaceur e D. Barjon. "Propriétés structurales et optiques des composés quaternaires de CuIn1—xAlxS2 spray". physica status solidi (a) 165, n. 1 (gennaio 1998): 141–50. http://dx.doi.org/10.1002/(sici)1521-396x(199801)165:1<141::aid-pssa141>3.0.co;2-h.
Bourass, Mohamed, e Mohammed Bouachrine. "Étude structurale des systèmes dissymétriques de structure D-π-A à base de thiénopyrazine destinés aux cellules solaires organiques de type « bulk heterojunction » (BHJ)". Canadian Journal of Chemistry 97, n. 10 (ottobre 2019): 745–55. http://dx.doi.org/10.1139/cjc-2019-0053.
PRACHE, S., B. MARTIN, P. NOZIERE, E. ENGEL, J. M. BESLE, A. FERLAY, D. MICOL, A. CORNU, I. CASSAR-MALEK e D. ANDUEZA. "Authentification de l’alimentation des ruminants à partir de la composition de leurs produits et tissus". INRAE Productions Animales 20, n. 4 (7 novembre 2007): 295–308. http://dx.doi.org/10.20870/productions-animales.2007.20.4.3467.
Yous, B., S. Robin, J. Robin e A. Donnadieu. "Effet de la structure sur les propriétés optiques de couches minces de composés de tungstène obtenues par décomposition en phase vapeur: Influence sur la sélectivité spectrale". Thin Solid Films 130, n. 3-4 (agosto 1985): 181–94. http://dx.doi.org/10.1016/0040-6090(85)90350-5.
Nyamba, Isaïe, Alexis M. W. Nembot, Charles B. Sombié, Hermine Zimé Diawara, Josias B. G. Yaméogo e Anna Lechanteur. "Utilisation du polyéthylène glycol 8000 comme plastifiant pour le développement de dispersions solides à base d’acide ellagique et d’Eudragit® EPO par extrusion à chaud". Journal Africain de Technologie Pharmaceutique et Biopharmacie (JATPB) 2, n. 3 (20 dicembre 2023). http://dx.doi.org/10.57220/jatpb.v2i3.122.
Tesi sul tema "Composés ternaires – Propriétés optiques":
Tchounkeu, Magloire. "Etudes des propriétés optiques et physiques de GaN-Al2O3 : caractérisation et effets de contraintes". Montpellier 2, 1998. http://www.theses.fr/1998MON20029.
Sefiani, Saïd. "Caractérisation et élaboration de couches minces d'alliages ternaires amorphes silicium-carbone-germanium par décomposition thermique de molécules organogermanosiliciées". Toulouse, INPT, 1992. http://www.theses.fr/1992INPT062G.
Mabrouk, Salima. "Synthèse par voie colloïdale et étude des propriétés optiques et structurales de nanocristaux ternaires ZnSeS dopés". Electronic Thesis or Diss., Université de Lorraine, 2022. http://www.theses.fr/2022LORR0169.
In recent years, ternary QDs have experienced an exponential development thanks to their properties, especially their photoluminescence, which can be controlled not only by their size but also by their composition. As part of this thesis, we developed a new "green" synthesis in aqueous media of ZnSeS-doped ternary QDs and we studied the effect of the variation of the dopant (Mn2+, Cu2+, or Cu2+/Al3+) as well as its localization (in the core or in the shell) on their optical and structural properties. The first part of this work describes the synthesis of ZnSeS:Mn ternary QDs and ZnSeS:Mn/ZnS core/shell using 2-MPA as a ligand. The results obtained show that these nanocrystals can be prepared with quantum yields of 22% and 41%, respectively. These QDs have shown excellent photostability under UV irradiation and can easily be transferred to the organic phase using the hydrophobic octanethiol ligand without altering their optical properties. Subsequently, core/shell ZnSeS/ZnS:Cu/ZnS QDs for which the Cu dopant is introduced into the first shell were prepared using 3-MPA as a ligand. Excellent (photo)stability in the presence of air and oxygen was observed. ZnSeS/ZnS:Cu/ZnS core/shell QDs have a 20% photoluminescence quantum yield and have been used as photoluminescent probes for the detection of Pb2+ ions in aqueous media. A selective extinction of the photoluminescence emission in the presence of Pb2+ ions was observed. Finally, Cu and Al co-doped QDs, ZnSeS/ZnS:Cu/ZnS:Al/ZnS (first shell doped with Cu2+ and second shell doped with Al3+) were prepared. Co-doping allows the improvement of the optical properties, including quantum efficiency (up to 32%) as well as the photoluminescence lifetime of Cu-doped QDs
Juillaguet, Sandrine. "Effets d'interruptions de croissance sur les propriétés optiques des puits quantiques ultra minces GaInAs/InP". Montpellier 2, 1992. http://www.theses.fr/1992MON20218.
Achargui, Nour-Eddine. "Elaboration de ZnSiAs2 par E. P. V. Et E. P. V. O. M : caractérisations optiques et électriques". Montpellier 2, 1991. http://www.theses.fr/1991MON20263.
Aloui, Thamer. "Synthèse et caractérisations d'oxydes de molybdate pour des applications environnementales et/ou énergétiques". Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPASN003.
Development of green advanced processes for energy production and/or environmental protection is of prime importance. For this purpose, transition metal ternary oxides have been synthesized in the laboratory by a coprecipitation method. These are AMoO4 bifunctional molybdate particles (A = Co, Ni and Cd), of which we have sought to master the key parameters that make it possible to modulate the sizes and or shapes while ensuring reproducibility of the synthesis process. Several characterization techniques (DRX, FTIR, MEB, AFM, EDS) were used to access different characteristic parameters: crystal structure, lattice parameters, the crystallites size and strain. Measurements highlighted differences between the three molybdates concerning the mesh parameters and the existence of micro-stresses (extension or compression) as well as of defects and vacancies. This difference also concerned the surface roughness (mean square height values of a few tens of nanometers) as well as the size (from a hundred nanometers to tens micrometers) and the shape (agglomerated nano-rods for CoMoO4, nano-sheets for NiMoO4 and spheroids for CdMoO4). These features have been used to illustrate the combined multi-scale structural effects on the photo-catalytic performance of AMoO4 ternary systems. Beforehand, the optical properties of these compounds were evaluated by UV-Visible diffuse reflectance spectrophotometry (DRS). The optical band gaps were estimated by fitting the experimental measurements by the Kubelka-Munk model: 2.8, 2.4 and 3.7 eV in the cases of Co, Ni and Cd respectively. The concept of band diagram (EC and EV energy levels), associated with that of electrochemical potential (electronegativity and free energy of electrons), made it possible to establish an energy diagram verifying the adequacy between the potential energies (EC and EV) involved and the redox potentials of the couples H2O/•OH, OH-/•OH et O2/•O2‐ and therefore the potential of these ternary oxides to be efficiently used in the field of photocatalysis.The photo-catalytic tests, carried out on methylene blue (BM) considered as a dye (pollutant) model, were very conclusive with a degradation efficiency, under only one-hour irradiation, of order of 87% with NiMoO4 and of the order of 52% for CoMoO4. For the latter, the simplified model of Langmuir-Hinshelwood, proposed by Vollbrecht was suitable for fitting the experimental data, while it is the pseudo second order Nelson-Yoon model which proved to be the more suitable for nickel. The values of the kinetic constants then being much higher than those estimated from the simplified Langmuir model, sign of higher degradation process speed, in disagreement with other works relating to the same AMoO4 compounds.The reuse of molybdate particles in successive photo-catalytic cycles has shown that the degradation rates of MB under the effect of NiMoO4 remain quite remarkable despite the observed decrease: 80%, 74%, 65% and 55% from the second cycle to the last one. Under identical conditions, CoMoO4, showed a slower decrease in the photo-degradation efficiency: 47% and 46% for the second and third cycles against 52% for the first
Mrad, Maroua. "Nouveaux procédés de synthèse en milieu aqueux de quantum dots ternaires AgInS₂ (AIS) et quaternaires AgInS₂/ZnS (AIZS). Dopage de ces nanocristaux par Ni²⁺ ou Co²⁺. Application à la photocatalyse hétérogène". Electronic Thesis or Diss., Université de Lorraine, 2021. http://www.theses.fr/2021LORR0119.
Quantum dots (QDs) have high potential for biological detection, photovoltaics and catalysis due to their unique photophysical properties. The most studied semiconductors contain heavy metals such as cadmium and lead and their fields of application are very limited. As part of this thesis, we developed new aqueous synthesis processes for ternary QDs AgInS₂ and quaternary AgInS₂/ZnS and studied their doping by the Ni(+2) and Co(+2) cations to prepare nanocrystals with fluorescent and magnetic properties. We first optimized the synthesis of AIZS QDs in aqueous media using 3-MPA as ligand and produced nanocrystals with a fluorescence quantum yield of 65%. Then, the doping of these nanocrystals by cations Ni(2+) and Co(2+) was studied. A drop in quantum fluorescence efficiency is observed after doping. The best magnetic properties were observed at low temperature (10 K) and the magnetization values increase with the dopant concentration. The AIZS QDs have been associated with the ZnO nanorods by heterojunction to form a good photocatalyst ZnO/AIZS(10%) which degrades 98% of the Orange II in visible during 90 min under intensity 40 W/cm². This material can be reused, its photocatalytic activity only slightly decreases after 8 cycles (91% photodegradation)
Amanowicz, Michel. "Etude des propriétés de transport galvanomagnétique de composés de neptunium et de plutonium". Université Joseph Fourier (Grenoble), 1995. http://www.theses.fr/1995GRE10038.
Courtois, Denis. "Contribution à l'étude des propriétés cristallographiques et magnétiques des composés R3(Fe,T')29 (R=terre rare, T'=Ti ou V)". Université Joseph Fourier (Grenoble ; 1971-2015), 1997. http://www.theses.fr/1997GRE10247.
Tomey, Lopez Estanislao Pablo. "Contribution à l'étude des propriétés structurales et magnétiques des composés intermétalliques de terre rare RFe10,5Mo1,5 : effets des éléments interstitiels H, C et N". Université Joseph Fourier (Grenoble), 1994. http://www.theses.fr/1994GRE10245.
Libri sul tema "Composés ternaires – Propriétés optiques":
T, Kobayashi, e Kobunshi Sozai Center (Japan), a cura di. Nonlinear optics of organics and semiconductors: Proceedings of the international symposium, Tokyo, Japan, July 25-26, 1988. Berlin: Springer-Verlag, 1989.
Yamada, Hiroko, e Shiki Yagai. Light-Active Functional Organic Materials. Jenny Stanford Publishing, 2019.
Yamada, Hiroko, e Shiki Yagai. Light-Active Functional Organic Materials. Jenny Stanford Publishing, 2019.
Yamada, Hiroko, e Shiki Yagai. Light-Active Functional Organic Materials. Jenny Stanford Publishing, 2019.
Yamada, Hiroko, e Shiki Yagai. Light-Active Functional Organic Materials. Taylor & Francis Group, 2019.
Yamada, Hiroko, e Shiki Yagai. Light-Active Functional Organic Materials. Jenny Stanford Publishing, 2019.